GB953774A - Improvements in electron discharge device - Google Patents

Improvements in electron discharge device

Info

Publication number
GB953774A
GB953774A GB16403/62A GB1640362A GB953774A GB 953774 A GB953774 A GB 953774A GB 16403/62 A GB16403/62 A GB 16403/62A GB 1640362 A GB1640362 A GB 1640362A GB 953774 A GB953774 A GB 953774A
Authority
GB
United Kingdom
Prior art keywords
grid
wires
ring
support ring
tungsten
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB16403/62A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB953774A publication Critical patent/GB953774A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/36—Tubes with flat electrodes, e.g. disc electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/38—Control electrodes, e.g. grid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0015—Non-sealed electrodes
    • H01J2893/0016—Planar grids

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Microwave Tubes (AREA)
  • Lasers (AREA)

Abstract

953,774. Thermionic valves. GENERAL ELECTRIC CO. April 30, 1962 [May 1, 1961], No. 16403/62. Heading H1D. A grid assembly includes a grid support ring 8 and a grid terminal ring 6, which have unequal coefficients of expansion, are in contact only over diametrically opposed portions 32, and fuse together at elevated temperatures during tube processing, the arrangement being such that upon contraction, the grid support ring is distorted in such a way that parallel grid wires 10 stretched thereacross are tensioned. As shown, the triode envelope includes electrode terminals 2, 6, 14, 24 of titanium, and insulating portions 4, 12, 18 of forsterite. The grid terminal 6 includes ears 32, 32<SP>1</SP>, which extend arcuately for 60 degrees each, and during tube processing at 800‹ to 1100‹ C., fuse to the tungsten grid support ring 8. Since the radial contraction of ring 6 is greater than that of ring 8, ring 8 is compressed in a direction perpendicular to the wires 10, and the wires 10 are correspondingly tensioned. The spacing between grid wires 10 and cathode 16 is determined by a molybdenum or tantalum spacer 34. The grid includes 143 tungsten wires at a density of 736 per inch.
GB16403/62A 1961-05-01 1962-04-30 Improvements in electron discharge device Expired GB953774A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US106630A US3196307A (en) 1961-05-01 1961-05-01 Electron discharge device with grid wire tensioning means and method

Publications (1)

Publication Number Publication Date
GB953774A true GB953774A (en) 1964-04-02

Family

ID=22312451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16403/62A Expired GB953774A (en) 1961-05-01 1962-04-30 Improvements in electron discharge device

Country Status (3)

Country Link
US (1) US3196307A (en)
DE (1) DE1858073U (en)
GB (1) GB953774A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436585A (en) * 1964-04-20 1969-04-01 Nippon Electric Co Electron tube planar grid electrode
US3573535A (en) * 1968-11-12 1971-04-06 Gen Electric High-frequency electronic tube having novel grid mounting
US4446398A (en) * 1981-10-29 1984-05-01 Rca Corporation Vibration inhibiting mesh assembly for a pick-up tube

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495259A (en) * 1945-11-14 1950-01-24 Jackson George Samuel Taut grid electrode for electron tubes
US2803782A (en) * 1950-09-22 1957-08-20 Philips Corp Triode thermionic tube
US3151264A (en) * 1960-03-28 1964-09-29 Philips Corp Grid electrode having particular expansion characteristics

Also Published As

Publication number Publication date
DE1858073U (en) 1962-09-06
US3196307A (en) 1965-07-20

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